Simone Tripodi wrote:
Hi Reinhard,
I'm sorry I was not very clear, as "reloader" I mean a sort of XSLT
watchdog that reload it when it's changed - it's a feature already
present in oldest Cocoon's version, Sylvain spoke about it in the Jira
issue
There are two ways you can consider to reload stylesheets: check if it's
up to date when it is used, and reload if necessary, or have a
background watchdog that triggers reload.
The first solution is the simplest one to implement, but has two drawbacks:
- the first user request that uses the modified stylesheet pays the cost
of reloading. Probably not an issue in production systems though, since
XSLTs are not supposed to change often and are usually fast to load.
- on a busy system, it puts a high load on the filesystem to check if
the file has changed. This is solved by ensuring the file is checked
only once for a given period of time (e.g. 1 second) regardless of the
number of uses of the stylesheet that happen during this period. This is
achieved by using a DelayedValidity object that wraps the actual source
validity.
Sylvain
[1]
http://svn.apache.org/repos/asf/cocoon/trunk/core/cocoon-core/src/main/java/org/apache/cocoon/components/source/impl/validity/DelayedValidity.java
--
Sylvain Wallez - http://bluxte.net
